We are having been using the api to send diff files to canvas every night. Recently, these files having been failing. These are the messages we are getting. Does anyone know what the problem could be? Nothing has changed with the files other than the data. Thanks

Can't perform diffing against more than one file of the same type
"Error while importing CSV. Please contact support. (Error report 170000091689788)"
"Error while importing CSV. Please contact support. (Error report 170000091689789)"
"Error while importing CSV. Please contact support. (Error report 170000091689790)"
"Error while importing CSV. Please contact support. (Error report 170000091689791)"